android全屏 屏蔽返回键 代码

public class Algorithm extends Activity { protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // 设置无标题栏 requestWindowFeature(Window.FEATURE_NO_TITLE); //全屏 getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN); setContentView(R.layout.algorithm); } //屏蔽返回键 public boolean onKeyDown(int keyCode, KeyEvent event) { switch (keyCode) { case KeyEvent.KEYCODE_BACK: return true; } return super.onKeyDown(keyCode, event); } }